A one leg stand is one of three main field sobriety tests Massachusetts law enforcement use as a means to measure any impairments a driver may have due to drinking or taking drugs. There are many factors that can cause the test to produce false results, even when a person is not intoxicated…

A Horizontal Gaze Nystagmus test is one of three main field sobriety tests Massachusetts law enforcement use as a means to detect or measure any impairments a driver may have due to drinking or taking drugs.